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295 lines
6.3 KiB
C
295 lines
6.3 KiB
C
#include "btree_gist.h"
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#include "btree_utils_num.h"
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typedef struct
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{
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Timestamp lower;
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Timestamp upper;
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} tsKEY;
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/*
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** timestamp ops
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*/
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PG_FUNCTION_INFO_V1(gbt_ts_compress);
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PG_FUNCTION_INFO_V1(gbt_tstz_compress);
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PG_FUNCTION_INFO_V1(gbt_ts_union);
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PG_FUNCTION_INFO_V1(gbt_ts_picksplit);
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PG_FUNCTION_INFO_V1(gbt_ts_consistent);
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PG_FUNCTION_INFO_V1(gbt_tstz_consistent);
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PG_FUNCTION_INFO_V1(gbt_ts_penalty);
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PG_FUNCTION_INFO_V1(gbt_ts_same);
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Datum gbt_ts_compress(PG_FUNCTION_ARGS);
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Datum gbt_tstz_compress(PG_FUNCTION_ARGS);
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Datum gbt_ts_union(PG_FUNCTION_ARGS);
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Datum gbt_ts_picksplit(PG_FUNCTION_ARGS);
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Datum gbt_ts_consistent(PG_FUNCTION_ARGS);
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Datum gbt_tstz_consistent(PG_FUNCTION_ARGS);
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Datum gbt_ts_penalty(PG_FUNCTION_ARGS);
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Datum gbt_ts_same(PG_FUNCTION_ARGS);
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#define P_TimestampGetDatum(x) PointerGetDatum( &(x) )
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static bool
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gbt_tsgt(const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_gt, PointerGetDatum(a), PointerGetDatum(b))
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);
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}
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static bool
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gbt_tsge(const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_ge, PointerGetDatum(a), PointerGetDatum(b))
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);
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}
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static bool
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gbt_tseq(const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_eq, PointerGetDatum(a), PointerGetDatum(b))
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);
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}
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static bool
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gbt_tsle(const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_le, PointerGetDatum(a), PointerGetDatum(b))
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);
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}
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static bool
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gbt_tslt(const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_lt, PointerGetDatum(a), PointerGetDatum(b))
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);
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}
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static int
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gbt_tskey_cmp(const void *a, const void *b)
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{
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if (gbt_tsgt((void *) &(((Nsrt *) a)->t[0]), (void *) &(((Nsrt *) b)->t[0])))
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return 1;
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else if (gbt_tslt((void *) &(((Nsrt *) a)->t[0]), (void *) &(((Nsrt *) b)->t[0])))
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return -1;
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return 0;
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}
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static const gbtree_ninfo tinfo =
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{
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gbt_t_ts,
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sizeof(Timestamp),
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gbt_tsgt,
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gbt_tsge,
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gbt_tseq,
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gbt_tsle,
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gbt_tslt,
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gbt_tskey_cmp
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};
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/**************************************************
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* timestamp ops
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**************************************************/
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static Timestamp *
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tstz_to_ts_gmt(Timestamp *gmt, TimestampTz *ts)
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{
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int val,
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tz;
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*gmt = *ts;
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DecodeSpecial(0, "gmt", &val);
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if (!TIMESTAMP_NOT_FINITE(*ts))
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{
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tz = val * 60;
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#ifdef HAVE_INT64_TIMESTAMP
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*gmt -= (tz * INT64CONST(1000000));
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#else
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*gmt -= tz;
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*gmt = JROUND(*gmt);
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#endif
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}
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return gmt;
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}
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Datum
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gbt_ts_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval = NULL;
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PG_RETURN_POINTER(gbt_num_compress(retval, entry, &tinfo));
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}
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Datum
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gbt_tstz_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval;
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if (entry->leafkey)
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{
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tsKEY *r = (tsKEY *) palloc(sizeof(tsKEY));
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TimestampTz ts = *(TimestampTz *) DatumGetPointer(entry->key);
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Timestamp gmt;
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tstz_to_ts_gmt(&gmt, &ts);
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retval = palloc(sizeof(GISTENTRY));
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r->lower = r->upper = gmt;
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gistentryinit(*retval, PointerGetDatum(r),
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entry->rel, entry->page,
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entry->offset, sizeof(tsKEY), FALSE);
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}
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else
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retval = entry;
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PG_RETURN_POINTER(retval);
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}
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Datum
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gbt_ts_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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Timestamp *query = (Timestamp *) PG_GETARG_POINTER(1);
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tsKEY *kkk = (tsKEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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key.lower = (GBT_NUMKEY *) & kkk->lower;
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key.upper = (GBT_NUMKEY *) & kkk->upper;
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PG_RETURN_BOOL(
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gbt_num_consistent(&key, (void *) query, &strategy, GIST_LEAF(entry), &tinfo)
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);
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}
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Datum
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gbt_tstz_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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TimestampTz *query = (Timestamp *) PG_GETARG_POINTER(1);
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char *kkk = (char *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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Timestamp qqq;
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key.lower = (GBT_NUMKEY *) & kkk[0];
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key.upper = (GBT_NUMKEY *) & kkk[MAXALIGN(tinfo.size)];
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tstz_to_ts_gmt(&qqq, query);
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PG_RETURN_BOOL(
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gbt_num_consistent(&key, (void *) &qqq, &strategy, GIST_LEAF(entry), &tinfo)
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);
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}
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Datum
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gbt_ts_union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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void *out = palloc(sizeof(tsKEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(tsKEY);
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PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
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}
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Datum
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gbt_ts_penalty(PG_FUNCTION_ARGS)
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{
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tsKEY *origentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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tsKEY *newentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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Interval *intr;
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#ifdef HAVE_INT64_TIMESTAMP
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int64 res;
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#else
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double res;
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#endif
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intr = DatumGetIntervalP(DirectFunctionCall2(
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timestamp_mi,
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P_TimestampGetDatum(newentry->upper),
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P_TimestampGetDatum(origentry->upper)
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));
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/* see interval_larger */
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res = Max(intr->time + intr->month * (30 * 86400), 0);
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pfree(intr);
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intr = DatumGetIntervalP(DirectFunctionCall2(
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timestamp_mi,
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P_TimestampGetDatum(origentry->lower),
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P_TimestampGetDatum(newentry->lower)
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));
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/* see interval_larger */
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res += Max(intr->time + intr->month * (30 * 86400), 0);
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pfree(intr);
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*result = 0.0;
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if (res > 0)
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{
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intr = DatumGetIntervalP(DirectFunctionCall2(
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timestamp_mi,
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P_TimestampGetDatum(origentry->upper),
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P_TimestampGetDatum(origentry->lower)
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));
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*result += FLT_MIN;
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*result += (float) (res / ((double) (res + intr->time + intr->month * (30 * 86400))));
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*result *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1));
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pfree(intr);
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}
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_ts_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(gbt_num_picksplit(
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(GistEntryVector *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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&tinfo
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));
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}
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Datum
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gbt_ts_same(PG_FUNCTION_ARGS)
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{
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tsKEY *b1 = (tsKEY *) PG_GETARG_POINTER(0);
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tsKEY *b2 = (tsKEY *) PG_GETARG_POINTER(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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*result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
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PG_RETURN_POINTER(result);
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}
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